L77HDD78SOL2C309 Equivalent & Substitute Parts

Part Overview

The L77HDD78SOL2C309 is a 78-position D-Sub high-density receptacle connector manufactured by Amphenol ICC. This through-hole solder-terminated connector features female sockets in a 4-row configuration with a DD/D shell size. The connector is designed for signal applications requiring robust electrical performance across industrial temperature ranges. The part maintains active product status with RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, manufacturing discontinuation, or application-specific requirements.

Substiute Parts

L77HDD78SOL2C309

Amphenol ICC (Commercial Products)In Stock: 1160L77HDD78SOL2C309 Datasheet

Current PartRFQ

09641147212

HARTINGIn Stock: 92609641147212 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L77HDD78SOL2C309 is limited by its high-density 78-position configuration. The identified substitute part 09641147212 from HARTING represents a different connector class with significantly different electrical and mechanical specifications. Substitution between these parts is not supported based on the following critical parameter mismatches:

Critical Differentiating Parameters:

• Number of Positions: L77HDD78SOL2C309 has 78 positions; 09641147212 has 9 positions
• Shell Size: L77HDD78SOL2C309 uses DD/D high-density shell; 09641147212 uses DE/E standard shell
• Voltage Rating: L77HDD78SOL2C309 rated 250V; 09641147212 rated 100V
• Current Rating: L77HDD78SOL2C309 rated 3A; 09641147212 rated 7.5A
• Operating Temperature: L77HDD78SOL2C309 operates -55°C ~ 155°C; 09641147212 operates -20°C ~ 125°C
• Mounting Configuration: L77HDD78SOL2C309 is vertical; 09641147212 is right-angle

The substitute listing indicates cross-reference availability only and does not establish functional equivalence for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

Both the L77HDD78SOL2C309 and 09641147212 maintain active product status with current manufacturer support. Both connectors achieve UL94 V-0 flammability compliance and MSL Level 1 moisture sensitivity rating, indicating suitability for standard storage and handling conditions.

The L77HDD78SOL2C309 is recommended for applications requiring:

• High-density signal distribution with 78 contact positions
• Extended operating temperature range (-55°C to 155°C)
• Higher voltage tolerance (250V rating)
• Vertical through-hole mounting configuration
• Gold-plated contacts for enhanced corrosion resistance

The 09641147212 is applicable only to applications requiring:

• Low-position-count connectivity (9 positions)
• Right-angle board mounting geometry
• Lower voltage environments (100V maximum)
• Restricted operating temperature range (-20°C to 125°C)

Direct substitution between these parts is not supported due to fundamental differences in connector architecture, electrical ratings, and physical form factor.

Frequently Asked Questions (FAQ)

Q: Can the 09641147212 replace the L77HDD78SOL2C309 in existing designs?

A: No. The 09641147212 is a 9-position standard D-Sub connector, while the L77HDD78SOL2C309 is a 78-position high-density connector. These represent different connector classes with incompatible pin counts, shell sizes, and electrical ratings. Direct substitution is not possible.

Q: What are the primary electrical differences between these connectors?

A: The L77HDD78SOL2C309 supports 250V operation with 3A current rating, while the 09641147212 supports 100V operation with 7.5A current rating. The voltage rating difference reflects different application classes and dielectric material specifications.

Q: Are both connectors suitable for industrial temperature environments?

A: The L77HDD78SOL2C309 operates across -55°C to 155°C, suitable for extended industrial and military temperature ranges. The 09641147212 operates across -20°C to 125°C, suitable for standard commercial and light industrial environments. Application temperature requirements determine which connector is appropriate.

Q: Do both connectors meet RoHS compliance requirements?

A: Yes. The L77HDD78SOL2C309 is RoHS Compliant. The 09641147212 is ROHS3 Compliant. Both meet current regulatory requirements for hazardous substance restrictions.

Q: What is the significance of the mounting type difference?

A: The L77HDD78SOL2C309 is a vertical through-hole connector, mounting perpendicular to the PCB. The 09641147212 is a right-angle through-hole connector, mounting parallel to the PCB. These represent different physical form factors for different board layout requirements.

Q: Are there contact finish differences between these connectors?

A: The L77HDD78SOL2C309 specifies gold-plated contacts (30.0µin thickness), providing enhanced corrosion resistance and signal integrity. The 09641147212 contact finish is not specified in available documentation.

Q: What packaging formats are available for these connectors?

A: The L77HDD78SOL2C309 is supplied in Tray packaging. The 09641147212 is supplied in Bulk packaging. Packaging format affects handling, storage, and integration into assembly processes.